/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:54:59,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:54:59,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:54:59,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 01:54:59,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 01:54:59,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 01:54:59,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 01:54:59,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 01:54:59,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 01:54:59,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 01:54:59,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 01:54:59,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 01:54:59,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:54:59,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:54:59,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:54:59,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:54:59,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:54:59,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:54:59,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:54:59,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:54:59,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:54:59,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:54:59,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:54:59,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:54:59,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-22 01:54:59,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-22 01:54:59,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-22 01:54:59,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-22 01:54:59,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-22 01:54:59,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-22 01:54:59,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-22 01:54:59,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-22 01:54:59,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-22 01:54:59,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-22 01:54:59,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-22 01:54:59,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-22 01:54:59,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-22 01:54:59,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-22 01:54:59,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:54:59,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:54:59,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:54:59,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:54:59,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:54:59,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:54:59,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:54:59,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:54:59,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:54:59,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:54:59,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:54:59,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:54:59,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:54:59,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:54:59,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:54:59,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:54:59,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:54:59,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:54:59,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:54:59,213 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:54:59,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:54:59,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:54:59,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:54:59,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:54:59,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:54:59,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:54:59,215 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:54:59,215 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:54:59,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:54:59,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:54:59,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:54:59,693 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:54:59,694 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:54:59,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2021-02-22 01:54:59,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ab0bd3f3/c05ef73354d642df8b8db3945087b481/FLAGe35fc8674 [2021-02-22 01:55:00,548 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:55:00,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2021-02-22 01:55:00,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ab0bd3f3/c05ef73354d642df8b8db3945087b481/FLAGe35fc8674 [2021-02-22 01:55:00,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ab0bd3f3/c05ef73354d642df8b8db3945087b481 [2021-02-22 01:55:00,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:55:00,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:55:00,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:55:00,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:55:00,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:55:00,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:55:00" (1/1) ... [2021-02-22 01:55:00,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2126fdb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:00, skipping insertion in model container [2021-02-22 01:55:00,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:55:00" (1/1) ... [2021-02-22 01:55:00,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:55:00,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:55:01,001 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2021-02-22 01:55:01,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:55:01,152 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:55:01,168 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2021-02-22 01:55:01,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:55:01,321 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:55:01,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01 WrapperNode [2021-02-22 01:55:01,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:55:01,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:55:01,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:55:01,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:55:01,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (1/1) ... [2021-02-22 01:55:01,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (1/1) ... [2021-02-22 01:55:01,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (1/1) ... [2021-02-22 01:55:01,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (1/1) ... [2021-02-22 01:55:01,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (1/1) ... [2021-02-22 01:55:01,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (1/1) ... [2021-02-22 01:55:01,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (1/1) ... [2021-02-22 01:55:01,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:55:01,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:55:01,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:55:01,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:55:01,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:55:01,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:55:01,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:55:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:55:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 01:55:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-22 01:55:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-22 01:55:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-02-22 01:55:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-02-22 01:55:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-02-22 01:55:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2021-02-22 01:55:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2021-02-22 01:55:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:55:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:55:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:55:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 01:55:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 01:55:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:55:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:55:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 01:55:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-22 01:55:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-22 01:55:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-22 01:55:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-22 01:55:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-22 01:55:01,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-22 01:55:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-22 01:55:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-22 01:55:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-22 01:55:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-22 01:55:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-22 01:55:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-22 01:55:01,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-22 01:55:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-22 01:55:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-22 01:55:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-22 01:55:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-22 01:55:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-22 01:55:01,567 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-02-22 01:55:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-02-22 01:55:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-02-22 01:55:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-22 01:55:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-22 01:55:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-22 01:55:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-22 01:55:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-22 01:55:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-22 01:55:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-22 01:55:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-22 01:55:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-22 01:55:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-22 01:55:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-22 01:55:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-22 01:55:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-22 01:55:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-22 01:55:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-22 01:55:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-22 01:55:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-22 01:55:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-22 01:55:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-22 01:55:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-22 01:55:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-22 01:55:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-22 01:55:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-22 01:55:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-22 01:55:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-22 01:55:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-22 01:55:01,571 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-22 01:55:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-22 01:55:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-22 01:55:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-22 01:55:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-22 01:55:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-22 01:55:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-22 01:55:01,572 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-22 01:55:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 01:55:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-22 01:55:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-22 01:55:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-22 01:55:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-22 01:55:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-22 01:55:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-22 01:55:01,573 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-22 01:55:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-22 01:55:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-22 01:55:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-22 01:55:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-22 01:55:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-22 01:55:01,574 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-22 01:55:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-22 01:55:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-22 01:55:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-22 01:55:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-22 01:55:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-22 01:55:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-22 01:55:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-22 01:55:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-22 01:55:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-22 01:55:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-22 01:55:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-22 01:55:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-22 01:55:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-22 01:55:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-22 01:55:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-22 01:55:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-22 01:55:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-22 01:55:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-22 01:55:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-22 01:55:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-22 01:55:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-22 01:55:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-22 01:55:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-22 01:55:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-22 01:55:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-22 01:55:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-22 01:55:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-22 01:55:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-22 01:55:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-22 01:55:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-22 01:55:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-22 01:55:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-22 01:55:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-22 01:55:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-22 01:55:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-22 01:55:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-22 01:55:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-22 01:55:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2021-02-22 01:55:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:55:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-22 01:55:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2021-02-22 01:55:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 01:55:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:55:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-22 01:55:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:55:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:55:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:55:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:55:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:55:02,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:55:02,318 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 01:55:02,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:55:02 BoogieIcfgContainer [2021-02-22 01:55:02,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:55:02,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:55:02,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:55:02,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:55:02,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:55:00" (1/3) ... [2021-02-22 01:55:02,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154cb607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:55:02, skipping insertion in model container [2021-02-22 01:55:02,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:01" (2/3) ... [2021-02-22 01:55:02,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154cb607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:55:02, skipping insertion in model container [2021-02-22 01:55:02,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:55:02" (3/3) ... [2021-02-22 01:55:02,329 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2021-02-22 01:55:02,337 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:55:02,343 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:55:02,365 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:55:02,391 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:55:02,391 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:55:02,392 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:55:02,392 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:55:02,392 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:55:02,392 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:55:02,392 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:55:02,392 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:55:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2021-02-22 01:55:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-22 01:55:02,424 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:02,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:02,426 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:02,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1236516545, now seen corresponding path program 1 times [2021-02-22 01:55:02,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:02,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119945539] [2021-02-22 01:55:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:02,538 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:02,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:02,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:02,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:02,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:55:02,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:02,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:02,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:02,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:02,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:02,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:55:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:03,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:03,065 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-22 01:55:03,066 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-22 01:55:03,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:03,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:03,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:55:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:03,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:03,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:03,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-22 01:55:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:03,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:03,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-02-22 01:55:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:03,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:03,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-22 01:55:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:03,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:03,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:03,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-02-22 01:55:03,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119945539] [2021-02-22 01:55:03,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:03,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 01:55:03,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207376067] [2021-02-22 01:55:03,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 01:55:03,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:03,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 01:55:03,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:55:03,240 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 9 states. [2021-02-22 01:55:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:04,120 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2021-02-22 01:55:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-22 01:55:04,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2021-02-22 01:55:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:04,132 INFO L225 Difference]: With dead ends: 192 [2021-02-22 01:55:04,132 INFO L226 Difference]: Without dead ends: 96 [2021-02-22 01:55:04,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-02-22 01:55:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-22 01:55:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-02-22 01:55:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-02-22 01:55:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-02-22 01:55:04,228 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 86 [2021-02-22 01:55:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:04,228 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-02-22 01:55:04,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 01:55:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-02-22 01:55:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-22 01:55:04,236 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:04,236 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:04,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:55:04,237 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:04,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1097503254, now seen corresponding path program 1 times [2021-02-22 01:55:04,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:04,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880557481] [2021-02-22 01:55:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:04,252 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:04,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:04,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:55:04,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:04,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:04,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:04,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:55:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:04,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:04,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:55:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:04,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:04,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-22 01:55:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:04,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:04,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-22 01:55:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:04,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:04,579 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-22 01:55:04,581 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-22 01:55:04,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:04,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:04,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-22 01:55:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:04,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:04,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:04,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 01:55:04,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:04,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-02-22 01:55:04,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880557481] [2021-02-22 01:55:04,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:04,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 01:55:04,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229223208] [2021-02-22 01:55:04,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 01:55:04,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:04,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 01:55:04,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:55:04,697 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 10 states. [2021-02-22 01:55:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:05,497 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2021-02-22 01:55:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-22 01:55:05,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2021-02-22 01:55:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:05,503 INFO L225 Difference]: With dead ends: 117 [2021-02-22 01:55:05,503 INFO L226 Difference]: Without dead ends: 94 [2021-02-22 01:55:05,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-02-22 01:55:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-22 01:55:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-02-22 01:55:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-02-22 01:55:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2021-02-22 01:55:05,535 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 93 [2021-02-22 01:55:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:05,536 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2021-02-22 01:55:05,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 01:55:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2021-02-22 01:55:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-22 01:55:05,538 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:05,539 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:05,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:55:05,539 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:05,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1922674771, now seen corresponding path program 1 times [2021-02-22 01:55:05,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:05,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904574222] [2021-02-22 01:55:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:05,547 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:05,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-22 01:55:05,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:05,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:55:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:05,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:55:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:05,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-22 01:55:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:05,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-22 01:55:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:05,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:05,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:05,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:05,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:05,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-22 01:55:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:05,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:05,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:05,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 01:55:05,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-02-22 01:55:05,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-02-22 01:55:05,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:05,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-02-22 01:55:06,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:06,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-22 01:55:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904574222] [2021-02-22 01:55:06,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:06,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-22 01:55:06,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408804952] [2021-02-22 01:55:06,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-22 01:55:06,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:06,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-22 01:55:06,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-22 01:55:06,066 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 14 states. [2021-02-22 01:55:06,750 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-22 01:55:06,909 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-22 01:55:07,052 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-22 01:55:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:07,502 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-02-22 01:55:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-22 01:55:07,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2021-02-22 01:55:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:07,508 INFO L225 Difference]: With dead ends: 104 [2021-02-22 01:55:07,508 INFO L226 Difference]: Without dead ends: 91 [2021-02-22 01:55:07,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-02-22 01:55:07,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-22 01:55:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-02-22 01:55:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-22 01:55:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-02-22 01:55:07,533 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 95 [2021-02-22 01:55:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:07,534 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-02-22 01:55:07,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-22 01:55:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-02-22 01:55:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-02-22 01:55:07,536 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:07,537 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:07,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:55:07,537 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:07,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:07,538 INFO L82 PathProgramCache]: Analyzing trace with hash -150000509, now seen corresponding path program 1 times [2021-02-22 01:55:07,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:07,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737686237] [2021-02-22 01:55:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:07,543 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:07,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:07,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:07,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:55:07,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:07,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:07,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:07,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:07,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:55:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:07,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:07,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:55:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:07,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:07,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-22 01:55:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:07,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:07,770 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-22 01:55:07,771 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-22 01:55:07,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:07,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:07,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-22 01:55:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:07,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:07,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:07,852 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-22 01:55:07,854 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-22 01:55:07,874 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-22 01:55:07,875 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-22 01:55:07,893 WARN L141 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size [2021-02-22 01:55:07,894 WARN L147 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size 16 [2021-02-22 01:55:07,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-22 01:55:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:07,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:07,935 WARN L141 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size [2021-02-22 01:55:07,936 WARN L147 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size 16 [2021-02-22 01:55:07,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:07,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:07,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:08,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:08,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 01:55:08,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:08,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-22 01:55:08,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737686237] [2021-02-22 01:55:08,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:08,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-22 01:55:08,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697941754] [2021-02-22 01:55:08,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-22 01:55:08,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:08,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-22 01:55:08,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-02-22 01:55:08,087 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 18 states. [2021-02-22 01:55:09,513 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-22 01:55:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:10,311 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2021-02-22 01:55:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-22 01:55:10,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2021-02-22 01:55:10,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:10,314 INFO L225 Difference]: With dead ends: 142 [2021-02-22 01:55:10,314 INFO L226 Difference]: Without dead ends: 119 [2021-02-22 01:55:10,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2021-02-22 01:55:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-22 01:55:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2021-02-22 01:55:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-22 01:55:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-02-22 01:55:10,355 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 103 [2021-02-22 01:55:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:10,359 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-02-22 01:55:10,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-22 01:55:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-02-22 01:55:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-02-22 01:55:10,369 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:10,370 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:10,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:55:10,370 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:10,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1905603578, now seen corresponding path program 1 times [2021-02-22 01:55:10,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:10,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234551230] [2021-02-22 01:55:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:10,379 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:10,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:10,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:10,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 01:55:10,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 01:55:10,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:10,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:10,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:10,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:55:10,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:55:10,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:10,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:10,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:10,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:55:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:10,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:10,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:55:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:10,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:10,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-22 01:55:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:10,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:10,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:10,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:10,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:10,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 01:55:10,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 01:55:10,869 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-22 01:55:10,870 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-22 01:55:10,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-22 01:55:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:10,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 01:55:10,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:10,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 01:55:10,989 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-22 01:55:10,990 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-22 01:55:11,021 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-22 01:55:11,023 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-22 01:55:11,057 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-22 01:55:11,057 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-22 01:55:11,059 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size [2021-02-22 01:55:11,059 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size 33 [2021-02-22 01:55:11,101 WARN L141 QuantifierPusher]: treesize reduction 9, result has 84.2 percent of original size [2021-02-22 01:55:11,103 WARN L147 QuantifierPusher]: treesize reduction 9, result has 84.2 percent of original size 48 [2021-02-22 01:55:11,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-22 01:55:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:11,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:11,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:11,174 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 01:55:11,175 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 01:55:11,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:11,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 01:55:11,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:11,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-22 01:55:11,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:11,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-22 01:55:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-22 01:55:11,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234551230] [2021-02-22 01:55:11,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:11,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-02-22 01:55:11,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234562931] [2021-02-22 01:55:11,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-22 01:55:11,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-22 01:55:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-02-22 01:55:11,407 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 26 states. [2021-02-22 01:55:13,223 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-22 01:55:13,393 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-02-22 01:55:13,827 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-02-22 01:55:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:14,304 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-02-22 01:55:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-22 01:55:14,304 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 105 [2021-02-22 01:55:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:14,307 INFO L225 Difference]: With dead ends: 123 [2021-02-22 01:55:14,307 INFO L226 Difference]: Without dead ends: 110 [2021-02-22 01:55:14,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=247, Invalid=2203, Unknown=0, NotChecked=0, Total=2450 [2021-02-22 01:55:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-02-22 01:55:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2021-02-22 01:55:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-02-22 01:55:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-02-22 01:55:14,358 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 105 [2021-02-22 01:55:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:14,360 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-02-22 01:55:14,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-02-22 01:55:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-02-22 01:55:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-02-22 01:55:14,364 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:14,364 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:14,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 01:55:14,364 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1705131996, now seen corresponding path program 2 times [2021-02-22 01:55:14,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:14,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37597066] [2021-02-22 01:55:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:14,371 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:14,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:14,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:14,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:55:14,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 01:55:14,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 01:55:14,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:14,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:14,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:14,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:55:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:14,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:14,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:55:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:14,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:14,648 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-22 01:55:14,649 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-22 01:55:14,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:14,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:14,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-22 01:55:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:14,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:14,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:14,741 WARN L141 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-02-22 01:55:14,742 WARN L147 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size 12 [2021-02-22 01:55:14,763 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-22 01:55:14,763 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-22 01:55:14,789 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-22 01:55:14,790 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-22 01:55:14,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-22 01:55:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:14,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 01:55:14,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:14,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 01:55:14,903 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-22 01:55:14,905 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-22 01:55:14,939 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-22 01:55:14,941 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-22 01:55:14,975 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-22 01:55:14,976 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-22 01:55:14,977 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size [2021-02-22 01:55:14,977 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size 33 [2021-02-22 01:55:15,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:15,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-22 01:55:15,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-22 01:55:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:15,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:15,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:15,084 WARN L141 QuantifierPusher]: treesize reduction 10, result has 66.7 percent of original size [2021-02-22 01:55:15,085 WARN L147 QuantifierPusher]: treesize reduction 10, result has 66.7 percent of original size 20 [2021-02-22 01:55:15,132 WARN L141 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size [2021-02-22 01:55:15,133 WARN L147 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size 20 [2021-02-22 01:55:15,166 WARN L141 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size [2021-02-22 01:55:15,167 WARN L147 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size 37 [2021-02-22 01:55:15,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:15,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-22 01:55:15,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:15,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-22 01:55:15,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:15,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 01:55:15,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:15,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-22 01:55:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-22 01:55:15,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37597066] [2021-02-22 01:55:15,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:15,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-02-22 01:55:15,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890844925] [2021-02-22 01:55:15,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-22 01:55:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-22 01:55:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-02-22 01:55:15,449 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 27 states. [2021-02-22 01:55:17,668 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-22 01:55:18,703 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-22 01:55:18,971 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-22 01:55:19,155 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-02-22 01:55:19,322 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-22 01:55:19,513 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-02-22 01:55:19,778 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-22 01:55:19,966 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-22 01:55:20,132 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-22 01:55:20,303 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-22 01:55:20,654 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-22 01:55:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:20,786 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2021-02-22 01:55:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-22 01:55:20,787 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2021-02-22 01:55:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:20,789 INFO L225 Difference]: With dead ends: 164 [2021-02-22 01:55:20,789 INFO L226 Difference]: Without dead ends: 141 [2021-02-22 01:55:20,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=591, Invalid=3569, Unknown=0, NotChecked=0, Total=4160 [2021-02-22 01:55:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-22 01:55:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-02-22 01:55:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-02-22 01:55:20,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2021-02-22 01:55:20,821 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 113 [2021-02-22 01:55:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:20,822 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2021-02-22 01:55:20,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-22 01:55:20,822 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2021-02-22 01:55:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-02-22 01:55:20,823 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:20,823 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:20,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 01:55:20,824 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:20,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1534694113, now seen corresponding path program 2 times [2021-02-22 01:55:20,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:20,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903617357] [2021-02-22 01:55:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:20,829 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:20,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:20,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:20,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:20,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:20,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:20,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 01:55:20,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:20,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-22 01:55:20,950 WARN L141 QuantifierPusher]: treesize reduction 4, result has 92.6 percent of original size [2021-02-22 01:55:20,951 WARN L147 QuantifierPusher]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-02-22 01:55:20,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:20,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:20,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:20,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:20,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:20,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:20,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:21,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:55:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:21,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:21,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:55:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:21,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:21,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:21,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:21,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:21,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 01:55:21,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 01:55:21,112 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-22 01:55:21,112 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-22 01:55:21,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-22 01:55:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:21,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 01:55:21,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 01:55:21,204 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-22 01:55:21,205 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-22 01:55:21,238 WARN L141 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size [2021-02-22 01:55:21,239 WARN L147 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size 28 [2021-02-22 01:55:21,273 WARN L141 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size [2021-02-22 01:55:21,274 WARN L147 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size 28 [2021-02-22 01:55:21,276 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size [2021-02-22 01:55:21,277 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size 38 [2021-02-22 01:55:21,315 WARN L141 QuantifierPusher]: treesize reduction 9, result has 85.5 percent of original size [2021-02-22 01:55:21,316 WARN L147 QuantifierPusher]: treesize reduction 9, result has 85.5 percent of original size 53 [2021-02-22 01:55:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-22 01:55:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:21,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-22 01:55:21,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-22 01:55:21,467 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size [2021-02-22 01:55:21,468 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24 [2021-02-22 01:55:21,507 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.6 percent of original size [2021-02-22 01:55:21,507 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.6 percent of original size 39 [2021-02-22 01:55:21,553 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.6 percent of original size [2021-02-22 01:55:21,554 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.6 percent of original size 39 [2021-02-22 01:55:21,555 WARN L141 QuantifierPusher]: treesize reduction 5, result has 90.7 percent of original size [2021-02-22 01:55:21,555 WARN L147 QuantifierPusher]: treesize reduction 5, result has 90.7 percent of original size 49 [2021-02-22 01:55:21,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-02-22 01:55:21,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-22 01:55:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:21,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:21,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:21,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:21,752 WARN L141 QuantifierPusher]: treesize reduction 10, result has 69.7 percent of original size [2021-02-22 01:55:21,753 WARN L147 QuantifierPusher]: treesize reduction 10, result has 69.7 percent of original size 23 [2021-02-22 01:55:21,822 WARN L141 QuantifierPusher]: treesize reduction 10, result has 75.0 percent of original size [2021-02-22 01:55:21,822 WARN L147 QuantifierPusher]: treesize reduction 10, result has 75.0 percent of original size 30 [2021-02-22 01:55:21,904 WARN L141 QuantifierPusher]: treesize reduction 18, result has 66.0 percent of original size [2021-02-22 01:55:21,905 WARN L147 QuantifierPusher]: treesize reduction 18, result has 66.0 percent of original size 35 [2021-02-22 01:55:21,965 WARN L141 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size [2021-02-22 01:55:21,966 WARN L147 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size 31 [2021-02-22 01:55:22,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:22,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 01:55:22,105 WARN L141 QuantifierPusher]: treesize reduction 45, result has 69.6 percent of original size [2021-02-22 01:55:22,106 WARN L147 QuantifierPusher]: treesize reduction 45, result has 69.6 percent of original size 103 [2021-02-22 01:55:22,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:22,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-22 01:55:22,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:22,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-02-22 01:55:22,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:22,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-02-22 01:55:22,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:22,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-02-22 01:55:22,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:22,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-02-22 01:55:22,844 WARN L141 QuantifierPusher]: treesize reduction 5, result has 91.4 percent of original size [2021-02-22 01:55:22,845 WARN L147 QuantifierPusher]: treesize reduction 5, result has 91.4 percent of original size 53 [2021-02-22 01:55:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-22 01:55:23,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903617357] [2021-02-22 01:55:23,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:23,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-02-22 01:55:23,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217828342] [2021-02-22 01:55:23,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-22 01:55:23,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-22 01:55:23,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-02-22 01:55:23,006 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 37 states. [2021-02-22 01:55:24,291 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-02-22 01:55:25,924 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-02-22 01:55:26,138 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-02-22 01:55:26,358 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-02-22 01:55:26,635 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2021-02-22 01:55:26,908 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-02-22 01:55:27,178 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-02-22 01:55:27,462 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2021-02-22 01:55:27,724 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-02-22 01:55:27,954 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-02-22 01:55:28,202 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2021-02-22 01:55:28,467 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-02-22 01:55:28,714 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2021-02-22 01:55:29,034 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-02-22 01:55:29,383 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2021-02-22 01:55:29,635 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-02-22 01:55:29,887 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-02-22 01:55:30,206 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2021-02-22 01:55:30,527 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2021-02-22 01:55:30,854 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-02-22 01:55:31,119 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-02-22 01:55:31,427 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-02-22 01:55:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:31,754 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2021-02-22 01:55:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-22 01:55:31,755 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 115 [2021-02-22 01:55:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:31,757 INFO L225 Difference]: With dead ends: 145 [2021-02-22 01:55:31,757 INFO L226 Difference]: Without dead ends: 132 [2021-02-22 01:55:31,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=703, Invalid=5149, Unknown=0, NotChecked=0, Total=5852 [2021-02-22 01:55:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-22 01:55:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 116. [2021-02-22 01:55:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-02-22 01:55:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2021-02-22 01:55:31,800 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 115 [2021-02-22 01:55:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:31,800 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2021-02-22 01:55:31,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-02-22 01:55:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2021-02-22 01:55:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-02-22 01:55:31,802 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:31,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:31,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-22 01:55:31,802 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:31,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1254377483, now seen corresponding path program 3 times [2021-02-22 01:55:31,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:31,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347734726] [2021-02-22 01:55:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:31,807 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:31,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:31,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:31,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:31,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:55:31,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:31,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 01:55:31,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:31,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-02-22 01:55:31,952 WARN L141 QuantifierPusher]: treesize reduction 29, result has 56.7 percent of original size [2021-02-22 01:55:31,953 WARN L147 QuantifierPusher]: treesize reduction 29, result has 56.7 percent of original size 38 [2021-02-22 01:55:31,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:31,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:31,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:31,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:31,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:32,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:55:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:32,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:32,036 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-22 01:55:32,036 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-22 01:55:32,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:32,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:55:32,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:55:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:32,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:32,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 01:55:32,116 WARN L141 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-02-22 01:55:32,116 WARN L147 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size 12 [2021-02-22 01:55:32,135 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-22 01:55:32,135 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-22 01:55:32,156 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-22 01:55:32,156 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-22 01:55:32,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-22 01:55:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:32,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 01:55:32,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 01:55:32,257 WARN L141 QuantifierPusher]: treesize reduction 5, result has 84.4 percent of original size [2021-02-22 01:55:32,258 WARN L147 QuantifierPusher]: treesize reduction 5, result has 84.4 percent of original size 27 [2021-02-22 01:55:32,290 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size [2021-02-22 01:55:32,291 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size 32 [2021-02-22 01:55:32,335 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size [2021-02-22 01:55:32,339 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size 32 [2021-02-22 01:55:32,340 WARN L141 QuantifierPusher]: treesize reduction 5, result has 89.4 percent of original size [2021-02-22 01:55:32,341 WARN L147 QuantifierPusher]: treesize reduction 5, result has 89.4 percent of original size 42 [2021-02-22 01:55:32,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-02-22 01:55:32,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-22 01:55:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:32,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 01:55:32,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-22 01:55:32,532 WARN L141 QuantifierPusher]: treesize reduction 5, result has 80.8 percent of original size [2021-02-22 01:55:32,533 WARN L147 QuantifierPusher]: treesize reduction 5, result has 80.8 percent of original size 21 [2021-02-22 01:55:32,568 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size [2021-02-22 01:55:32,569 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size 31 [2021-02-22 01:55:32,611 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size [2021-02-22 01:55:32,611 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size 31 [2021-02-22 01:55:32,612 WARN L141 QuantifierPusher]: treesize reduction 5, result has 89.1 percent of original size [2021-02-22 01:55:32,613 WARN L147 QuantifierPusher]: treesize reduction 5, result has 89.1 percent of original size 41 [2021-02-22 01:55:32,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-02-22 01:55:32,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-22 01:55:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:32,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:32,746 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 01:55:32,746 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 01:55:32,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 01:55:32,820 WARN L141 QuantifierPusher]: treesize reduction 50, result has 36.7 percent of original size [2021-02-22 01:55:32,820 WARN L147 QuantifierPusher]: treesize reduction 50, result has 36.7 percent of original size 29 [2021-02-22 01:55:32,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:32,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 01:55:32,928 WARN L141 QuantifierPusher]: treesize reduction 16, result has 80.2 percent of original size [2021-02-22 01:55:32,930 WARN L147 QuantifierPusher]: treesize reduction 16, result has 80.2 percent of original size 65 [2021-02-22 01:55:33,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:33,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-22 01:55:33,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:33,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-22 01:55:33,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:33,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-22 01:55:33,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:33,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-22 01:55:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-22 01:55:33,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347734726] [2021-02-22 01:55:33,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:33,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-02-22 01:55:33,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99355084] [2021-02-22 01:55:33,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-22 01:55:33,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:33,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-22 01:55:33,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2021-02-22 01:55:33,300 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 36 states. [2021-02-22 01:55:35,111 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-02-22 01:55:35,954 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-02-22 01:55:36,872 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-02-22 01:55:37,312 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-22 01:55:37,549 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-02-22 01:55:37,871 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-02-22 01:55:38,080 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-22 01:55:38,301 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-02-22 01:55:38,541 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-02-22 01:55:38,865 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-02-22 01:55:39,111 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-22 01:55:39,332 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-02-22 01:55:39,570 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-02-22 01:55:39,888 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-02-22 01:55:40,102 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-02-22 01:55:40,297 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-22 01:55:40,513 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-02-22 01:55:40,946 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-22 01:55:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:41,096 INFO L93 Difference]: Finished difference Result 177 states and 183 transitions. [2021-02-22 01:55:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-22 01:55:41,097 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 123 [2021-02-22 01:55:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:41,099 INFO L225 Difference]: With dead ends: 177 [2021-02-22 01:55:41,099 INFO L226 Difference]: Without dead ends: 154 [2021-02-22 01:55:41,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=845, Invalid=5635, Unknown=0, NotChecked=0, Total=6480 [2021-02-22 01:55:41,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-22 01:55:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 135. [2021-02-22 01:55:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-22 01:55:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-02-22 01:55:41,134 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 123 [2021-02-22 01:55:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:41,134 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-02-22 01:55:41,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-02-22 01:55:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-02-22 01:55:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-02-22 01:55:41,135 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:41,136 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:41,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 01:55:41,136 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1940013816, now seen corresponding path program 3 times [2021-02-22 01:55:41,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:41,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582642904] [2021-02-22 01:55:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:41,141 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:55:41,182 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:55:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:55:41,228 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:55:41,285 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:55:41,285 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:55:41,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-22 01:55:41,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:55:41 BoogieIcfgContainer [2021-02-22 01:55:41,311 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:55:41,312 INFO L168 Benchmark]: Toolchain (without parser) took 40550.19 ms. Allocated memory was 153.1 MB in the beginning and 320.9 MB in the end (delta: 167.8 MB). Free memory was 128.0 MB in the beginning and 224.7 MB in the end (delta: -96.7 MB). Peak memory consumption was 72.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:41,312 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory was 127.3 MB in the beginning and 127.1 MB in the end (delta: 120.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:55:41,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 545.71 ms. Allocated memory is still 153.1 MB. Free memory was 126.8 MB in the beginning and 104.5 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:41,313 INFO L168 Benchmark]: Boogie Preprocessor took 132.80 ms. Allocated memory is still 153.1 MB. Free memory was 104.5 MB in the beginning and 134.3 MB in the end (delta: -29.8 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:41,313 INFO L168 Benchmark]: RCFGBuilder took 862.93 ms. Allocated memory is still 153.1 MB. Free memory was 134.3 MB in the beginning and 87.7 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:41,313 INFO L168 Benchmark]: TraceAbstraction took 38989.54 ms. Allocated memory was 153.1 MB in the beginning and 320.9 MB in the end (delta: 167.8 MB). Free memory was 87.2 MB in the beginning and 224.7 MB in the end (delta: -137.5 MB). Peak memory consumption was 31.3 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:41,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory was 127.3 MB in the beginning and 127.1 MB in the end (delta: 120.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 545.71 ms. Allocated memory is still 153.1 MB. Free memory was 126.8 MB in the beginning and 104.5 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 132.80 ms. Allocated memory is still 153.1 MB. Free memory was 104.5 MB in the beginning and 134.3 MB in the end (delta: -29.8 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 862.93 ms. Allocated memory is still 153.1 MB. Free memory was 134.3 MB in the beginning and 87.7 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 38989.54 ms. Allocated memory was 153.1 MB in the beginning and 320.9 MB in the end (delta: 167.8 MB). Free memory was 87.2 MB in the beginning and 224.7 MB in the end (delta: -137.5 MB). Peak memory consumption was 31.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L533] mlist *head; [L554] int i; [L555] mlist *mylist, *temp; [L556] CALL insert_list(mylist,2) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND TRUE head==((void *)0) [L545] l->next = ((void *)0) [L550] head = l [L551] return 0; [L556] RET insert_list(mylist,2) [L557] CALL insert_list(mylist,5) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L557] RET insert_list(mylist,5) [L558] CALL insert_list(mylist,1) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L558] RET insert_list(mylist,1) [L559] CALL insert_list(mylist,3) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L559] RET insert_list(mylist,3) [L560] CALL, EXPR search_list(head,2) [L535] l = head [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k [L536] COND FALSE !(l!=((void *)0) && l->key!=k) [L539] return l; [L560] RET, EXPR search_list(head,2) [L560] temp = search_list(head,2) [L561] EXPR temp->key [L561] CALL __VERIFIER_assert(temp->key==1) [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 108 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 38.8s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 30.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 535 SDtfs, 2246 SDslu, 2679 SDs, 0 SdLazy, 9298 SolverSat, 533 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 508 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 25.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 150 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...